未找到相关数据
LIQUID-CRYSTALLINE POLYURETHANE CONTAINING BIPHENYL UNITS
被引：18
作者：
TANAKA, M
NAKAYA, T
机构：
关键词：
CRYSTALS;
LIQUID;
D O I：
10.1295/koron.43.311
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ;
080501 ;
081704 ;
摘要：
Polyurethanes were synthesized by the reaction of 4,4 prime -di(2-hydroxymethyloxy)biphenyl with diisocyanates such as hexamethylene diisocyanate (HDI), dicyclohexylmethane 4,4 prime -diisocyanate (H//1//2MDI), cyclohexane 1,3-di(methylisocyanate) (H//6XDI), 2,4-tolylene diisocyanate (TDI), and 4,4 prime -diphenylmethane diisocyanate in DMF for 1. 5 hr at 100-140 degree C in the absence of catalysts. The polyurethanes obtained from HDI, H//1//2MDI, H//6XDI and TDI exhibited mesomorphic phase at 188-203 degree C, 147-172 degree C, 135-193 degree C and 151-193 degree C, respectively.
引用
收藏
页码：311 / 314
页数：4
相关论文